Guns of Diablo is a Metrocolor 1965 Western film directed by Boris Sagal, produced by Boris Ingster, and starring Charles Bronson, Susan Oliver and Kurt Russell. It follows a wagon train master, who runs into difficulties when he meets his girlfriend Maria, now married to Rance Macklin, whose father owned a ranch that Murdock once worked on.

This is an expanded version of the last episode of MGM-TV's brief series The Travels of Jaimie McPheeters ("The Day of the Reckoning"), originally telecast in black and white over ABC on March 15, 1964. Russ Conway refilmed Dan O'Herlihy's original scenes as Russell's father for this adaptation.